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J. G. FIESTER. MORTISING MACHINE. No. 245,289. Patented Aug. 9,1881.

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UNITED STATES PATENT Ounce.

JOHN G. FIESTER, OF READING, PENNSYLVANIA, ASSIGNOB OF ONE-HALF TO JACOB S. AMMON, OF SAME PLACE.

MORTlSlNG-MACHINE.

SPECIFICATION forming part of Letters Patent No. 245,289, dated August 9, 1881.

Application filed February 10, 1881.

useful Improvement in Mortising-lVIachines,

of which the following is a specification.

My invention relates to an improvement in mortising-machines in which a vertically reciprocating chisel mandrel or carrier operates in conjunction with a horizontal traversing bed; and the object of my invention is to provide means for the automatic removal of the chips from the mortise as they accumulate 1 therein from the chisel, and to so construct the device therefor that it may be actuated by the return movement of the chisel-carrier when it has butlittle resistance to overcome; and I attain these objects by the mechanism illustrated in the accompanying drawings, in which- Figure 1 is a front view, together with as much only of the old structure as will enable me to show the operation of my invention. Fig. 2 is a longitudinal vertical section through the mortise, showing the chisel on its downward stroke, having its griping-tongue open and ready to close upon the chips. Fig. 3 is a section on the same plane as Fig. 2, but showing the griping-tongue closed and about 0 to lift the chips from the mortise. Fig. 4 is a vertical section of slotted sleeve G, showing its manner of actuating the griping-tongue N, similar letters of reference indicating similar parts throughout the several views.

The cross-head D has a vertical reciprocatin g motion between housings A A, and is fitted with lugs E E as guides for the chisel mandrel or carrier F. Between lugs E E on chiselmandrel F is placed slotted sleeve G, fitted at its upper end with collar 1, having recess or indent t, anchor-lug 0, spring P, and projection or cam I. The sleeve G is fitted at its lower end with stop-collar H, the sleeve passing through the adjustable trip-guard J, and reciprocates with the cross-head D, less the length of slot g, where it slides on startingpin f. The trip-guard J is made adjustable vertically by wing-nuts K K and slots K K, the object of this being to permit of its adjustment to suit the respective positions of (No model.)

sleeve G as the cross-head D is set to suit different thicknesses of timber in Inortising, the guard J, always requiring to be adjusted relative to the positions of sleeve Grin order to assure the actuating of tongue N at the proper time. Fitted to the chisel-mandrel F is chiselsocket L, to which is pivoted, at a, gripingtongue N, properly curved at N 'to permit its grasping the chips, also curved at its upper end to facilitate the action upon it of projection I of sleeve G as sleeve G is tripped near each end ofits stroke by the trip-guard J. The

spring'P, held by anchor-lug 0, serves to retain the upper end of gripiug-tongue N in the indent t until it is released, near the lower end of the stroke, by collar I on the upper end of sleeve Gr being arrested by trip-guard J.

It will be seen that as the collar I is'arrested near the lower end of the stroke of cross-head D, the downward motion of cross-head D and chisel-mandrel F will be continued a trifle farther, or nearly to the lower end of slot 9 in sleeve G, thus causing tongue N to be dragged out ofindent t and on top of lug I and closing it upon the chips, and again releasing thechips, near the upper end of the stroke, by collar H on the lower end of sleeve G being tripped and arrested near the upper end by trip-guard J.

Again, referring to the construction of griping-tongue N, itshould be made of good spring steel, tempered at the griping end and slightly curved and sharpened, (but not to so fine an edge as to impair its strength,)-and be made a little narrower than the chisel intended to be used, in order to permit it to work freely in the mortise.

T is a standard scale, vertically adjustable by screws S S and traversing nuts t t, supported by uprights R It secured to table B. The standard scale T is graduated in inches and fractions thereof, and travels with table B, and in conjunction with chisel M measures the length of mortise.

Q Q, are levers for reversing the direction of the vertical side of chisel M in squaring out the ends of mortise V.

The operation of my improvement is as follows: The timber V being secured to the table (or traversing-bed) B, the cross-head D is then set-to the proper height relatively to the length 1C0 of chisel M and thickness of timber V. The reciprocating'motion may be imparted to crosshead D by a crank or eccentric or other suit able device. It should be provided with an extension-pitman, (or connecting-rod,) in order to permit of adjustment of cross-head D to various positions of vertical adjustment relative to the posit-ion of the crank and thickness of timber worked. One or more holes should also be bored to permit the entrance into the mortise of tongue N. The trip-guard J is then set in such position relative to the travels of sleeve G and chisel-mandrel F, respectively, that it will arrest the travel of sleeve G by con tact with collar I, just as chisel Nis at the bottom ofinortise V, and permitmandrel F to pass the length ofslot 9 below the bottom ot'mortise V, thus causing griping-tongue Nto mount the projection or lug I, as shown at I, Fig. 4, and causing the lower end of tongue N to close upon or gripe the chips, as shown at N, Fig. 3. The curved upper end oftongue 0 now remains in the slight indent yon lug I, which answers the twofold purpose, first, of keeping tongue N closed upon the chips, and, secondly, to prevent the reverse motion of cross-head D and mandrel F from causing the curved end 0 from slipping oil the lug l, which would cause tongue N to release the chips too soon, and before the chisel is out of the mortise, and compel sleeve G to move upward with cross-head D and mandrel F, until mandrel F is nearly at the upper end ofits stroke,when collar H of sleeve Gis again arrested by contact with the under side of tripguard J. The mandrel F, carrying pin f, will now continue on tillthe upper end of its stroke, or the length of slot 9, independent of sleeve G, as sleeve G is retained by trip-guard J, which permits the curved end 0 of tongue N to drop to the bottom of indent t and release the chips, as shown at N, Fig. 1.

Having fully described my invention, what I desire to secure by Letters Patent is The reciprocating sleeve G, in combination with chiselcarrier F and pin f, and provided with collars H and I, slot g, indents t and y, anchor-lug 0, spring P, and projection I, and operated in conjunction with griping-tongue N and adjustable trip-guard J, all substantially as herein shown and described.

JOHN CLAYTON FIESTER.

\Vitnesses:

H. H. HoLL, PETER S. HoLL. 

